Patents by Inventor Yoshiro Ushida

Yoshiro Ushida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Sensor for measuring air-fuel ratio
    Patent number: 4485369
    Abstract: A sensor for measuring air-fuel ratio, comprising a porous oxygen ion-conductive solid electrolyte sintered body having a pellet-like shape, and two heat-resistant metal wires embedded therein at a given interval, can measure accurately and easily the air-fuel ratio of a gas in a lean side, wherein the air-fuel ratio is not less than the theoretical air-fuel ratio.The solid electrolyte may be either zirconia or thoria containing as a stabilizer yttria, calcia or magnesia and having an apparent porosity of from about 5% to about 40%.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: November 27, 1984
    Assignee: NGK Spark Plug Co., Ltd.
    Inventor: Yoshiro Ushida